Home / 287,492.15-431,321.43-118,981.37

Finding the Fourth Proportional to 287,492.15, 431,321.43 and 118,981.37

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Solution

The fourth proportional to 287,492.15, 431,321.43 and 118,981.37 is: 178,506.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,492.15 : 431,321.43 = 118,981.37 : x
  2. Step 2: Convert to fraction form
    287,492.15/431,321.43 = 118,981.37/x
  3. Step 3: Cross multiply
    287,492.15x = 431,321.43 × 118,981.37
  4. Step 4: Simplify right side
    287,492.15x = 51,319,214,651.76
  5. Step 5: Solve for x
    x = 51,319,214,651.76/287,492.15
  6. Step 6: Final answer
    x = 178,506.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.